Portland cement
'pɔ:tlәnd
基本解释
n. 波特兰水泥,普通水泥,硅酸盐水泥
英文释义
A cement having the color of the Portland stone of
England, made by calcining an artificial mixture of carbonate of lime
and clay, or sometimes certain natural limestones or chalky clays. It
contains a large proportion of clay, and hardens under water.
上一个单词：Portland